AutoCodes – Generic – B2643

B2643 Code - Electric Compressor Output Line Short

Quick Answer

The Inverter in the electric compressor outputs high-voltage to operate the motor. Common causes include Faulty Electric Compressor, Electric Compressor harness is open or shorted, Electric Compressor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B2643 indicates Electric Compressor Output Line Short.
Common causes: Common causes include Faulty Electric Compressor, Electric Compressor harness is open or shorted, Electric Compressor circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 1,572

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jan 09, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2643 Description

The Inverter in the electric compressor outputs high-voltage to operate the motor. If there is an open or short in the output circuit, the inverter in the electric compressor will stop compressor operation and output the Diagnostic Trouble Code (DTC). The output DTC will be memorized as a past and present DTC. Compressor control may not resume unless the ignition switch is turned OFF, and waiting for 10 minutes.

OBDII Code B2643 - Electric Compressor Output Line Short - AutoCodes.com — B2643 Code - Electric Compressor Output Line Short

What does this mean?

What are the Possible Causes of the DTC B2643?

Faulty Electric Compressor
Electric Compressor harness is open or shorted
Electric Compressor circuit poor electrical connection
Faulty Inverter

How to Fix the DTC B2643?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B2643 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B2643 code?

Need more information on how to fix the B2643 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2643 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2643 Infiniti — Electric Compressor Output Line Short
B2643 Nissan — Electric Compressor Output Line Short

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B2643 Code

1. What are the common symptoms of OBDII code B2643 - Electric Compressor Output Line Short?

The common symptoms include the air conditioning system not functioning properly, unusual noises coming from the compressor, or the AC not cooling as expected.

2. What can cause the OBDII code B2643 to trigger?

This code usually triggers due to a short circuit in the electric compressor output line, which may be caused by damaged wiring, a faulty compressor, or a problem with the control module.

3. How can I diagnose the issue related to code B2643?

Diagnosing the issue involves inspecting the wiring harness for any visible damage, testing the compressor for proper operation, and using a multimeter to check for continuity in the output line.

4. Are there any quick repair tips for resolving code B2643?

One quick repair tip is to check and repair any damaged wiring in the electric compressor output line. Additionally, ensuring proper connection and grounding of the compressor can help resolve the issue.

5. Can I drive my vehicle with OBDII code B2643 present?

It is not recommended to drive your vehicle with this code present, as it can lead to further damage to the air conditioning system. It is best to address the issue promptly to prevent any potential issues.

6. How much does it typically cost to repair OBDII code B2643?

The cost of repairing this code can vary depending on the underlying cause of the issue. It may range from a simple wiring repair to a compressor replacement, so it is best to get a diagnostic from a professional technician.

7. Is it possible to reset the OBDII code B2643 without repairing the issue?

While you can clear the code using an OBDII scanner, it is not recommended to do so without addressing the underlying problem. The code is likely to return if the issue is not fixed.

8. Can weather conditions affect the occurrence of OBDII code B2643?

Extreme weather conditions, such as high temperatures or humidity, can potentially exacerbate issues related to the electric compressor output line short. It is important to keep the AC system well-maintained in all conditions.

9. How long does it typically take to repair OBDII code B2643?

The repair time for this code can vary depending on the complexity of the issue. Simple fixes like repairing wiring may take a few hours, while more involved repairs like compressor replacement could take longer.

10. Is it necessary to consult a professional mechanic for OBDII code B2643 repair?

While some DIY enthusiasts may be able to address simple wiring issues, it is generally recommended to consult a professional mechanic, especially for more complex problems like compressor or control module issues.